Timothy Pearson
10 years ago
parent
38c56c7c1f
commit
963b88fb0b
@ -0,0 +1,152 @@
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/*
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* Copyright (C) 2013 Tom King <ka6sox@gmail.com>
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* (C) 2013 Ian McMahon <ian.mcmahon@prototechnical.com>
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* (C) 2014 Timothy Pearson <kb9vqf@pearsoncomputing.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/dts-v1/;
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/plugin/;
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/ {
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compatible = "ti,beaglebone", "ti,beaglebone-black";
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/* identification */
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manufacturer = "Raptor Engineering";
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board-name = "Universal Laboratory Debug Control Interface";
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model = "ULABCTL001";
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part-number = "BB-BONE-ULAB";
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version = "0001";
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/* state the resources this cape uses */
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exclusive-use =
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/* the pin header uses */
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"P8.45", /* GPMC: gpmc_a0 */
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"P8.46", /* GPMC: gpmc_a1 */
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"P9.14", /* GPMC: gpmc_a2 */
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"P8.44", /* GPMC: gpmc_a3 */
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"P8.41", /* GPMC: gpmc_a4 */
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"P8.42", /* GPMC: gpmc_a5 */
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"P8.39", /* GPMC: gpmc_a6 */
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"P8.40", /* GPMC: gpmc_a7 */
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"P8.27", /* GPMC: gpmc_a8 */
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"P8.29", /* GPMC: gpmc_a9 */
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"P8.28", /* GPMC: gpmc_a10 */
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"P8.30", /* GPMC: gpmc_a11 */
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"P8.37", /* GPMC: gpmc_a12 */
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"P8.38", /* GPMC: gpmc_a13 */
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"P8.36", /* GPMC: gpmc_a14 */
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"P8.34", /* GPMC: gpmc_a15 */
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"P8.35", /* GPMC: gpmc_a16 */
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"P8.33", /* GPMC: gpmc_a17 */
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"P8.31", /* GPMC: gpmc_a18 */
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"P8.32", /* GPMC: gpmc_a19 */
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"P8.25", /* GPMC: gpmc_ad0 */
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"P8.24", /* GPMC: gpmc_ad1 */
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"P8.5", /* GPMC: gpmc_ad2 */
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"P8.6", /* GPMC: gpmc_ad3 */
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"P8.23", /* GPMC: gpmc_ad4 */
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"P8.22", /* GPMC: gpmc_ad5 */
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"P8.3", /* GPMC: gpmc_ad6 */
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"P8.4", /* GPMC: gpmc_ad7 */
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"P8.7", /* GPMC: gpmc_advn_ale */
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"P8.8", /* GPMC: gpmc_oen_ren */
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"P8.10", /* GPMC: gpmc_wen */
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"P9.11", /* GPIO: gpio0[30] */
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"P9.13", /* GPIO: gpio0[31] */
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"P9.21", /* GPIO: gpio0[3] */
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"P9.22", /* GPIO: gpio0[2] */
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"P8.43", /* GPIO: boot select */
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/* the hardware IP this cape uses */
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"GPMC";
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fragment@0 {
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target = <&am33xx_pinmux>;
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__overlay__ {
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bb_gpmc_pins: pinmux_bb_gpmc_pins {
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pinctrl-single,pins = <
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/* address bus */
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0x0a0 0x01 /* gpmc_a0, OUTPUT_PULLDOWN | MODE1 */
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0x0a4 0x01 /* gpmc_a1, OUTPUT_PULLDOWN | MODE1 */
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0x048 0x00 /* gpmc_a2, OUTPUT_PULLDOWN | MODE0 */
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0x0ac 0x01 /* gpmc_a3, OUTPUT_PULLDOWN | MODE1 */
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0x0b0 0x01 /* gpmc_a4, OUTPUT_PULLDOWN | MODE1 */
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0x0b4 0x01 /* gpmc_a5, OUTPUT_PULLDOWN | MODE1 */
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0x0b8 0x01 /* gpmc_a6, OUTPUT_PULLDOWN | MODE1 */
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0x0bc 0x01 /* gpmc_a7, OUTPUT_PULLDOWN | MODE1 */
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0x0e0 0x01 /* gpmc_a8, OUTPUT_PULLDOWN | MODE1 */
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0x0e4 0x01 /* gpmc_a9, OUTPUT_PULLDOWN | MODE1 */
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0x0e8 0x01 /* gpmc_a10, OUTPUT_PULLDOWN | MODE1 */
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0x0ec 0x01 /* gpmc_a11, OUTPUT_PULLDOWN | MODE1 */
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0x0c0 0x01 /* gpmc_a12, OUTPUT_PULLDOWN | MODE1 */
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0x0c4 0x01 /* gpmc_a13, OUTPUT_PULLDOWN | MODE1 */
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0x0c8 0x01 /* gpmc_a14, OUTPUT_PULLDOWN | MODE1 */
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0x0cc 0x01 /* gpmc_a15, OUTPUT_PULLDOWN | MODE1 */
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0x0d0 0x01 /* gpmc_a16, OUTPUT_PULLDOWN | MODE1 */
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0x0d4 0x01 /* gpmc_a17, OUTPUT_PULLDOWN | MODE1 */
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0x0d8 0x01 /* gpmc_a18, OUTPUT_PULLDOWN | MODE1 */
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0x0dc 0x01 /* gpmc_a19, OUTPUT_PULLDOWN | MODE1 */
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/* address/data muxed bus */
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0x000 0x30 /* gpmc_ad0, INPUT_PULLUP | MODE0 */
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0x004 0x30 /* gpmc_ad1, INPUT_PULLUP | MODE0 */
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0x008 0x30 /* gpmc_ad2, INPUT_PULLUP | MODE0 */
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0x00c 0x30 /* gpmc_ad3, INPUT_PULLUP | MODE0 */
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0x010 0x30 /* gpmc_ad4, INPUT_PULLUP | MODE0 */
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0x014 0x30 /* gpmc_ad5, INPUT_PULLUP | MODE0 */
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0x018 0x30 /* gpmc_ad6, INPUT_PULLUP | MODE0 */
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0x01c 0x30 /* gpmc_ad7, INPUT_PULLUP | MODE0 */
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/* control */
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0x090 0x10 /* gpmc_advn_ale, OUTPUT_PULLUP | MODE0 */
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0x094 0x10 /* gpmc_oen_ren, OUTPUT_PULLUP | MODE0 */
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0x098 0x10 /* gpmc_wen, OUTPUT_PULLUP | MODE0 */
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/* gpio */
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0x070 0x07 /* gpio0[30], OUTPUT_PULLDOWN | MODE7 */
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0x074 0x07 /* gpio0[31], OUTPUT_PULLDOWN | MODE7 */
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0x154 0x27 /* gpio0[3], INPUT_PULLDOWN | MODE7 */
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0x150 0x07 /* gpio0[2], OUTPUT_PULLDOWN | MODE7 */
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>;
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};
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};
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};
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fragment@1 {
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target = <&gpmc>;
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depth = <1>; /* only create devices on depth 1 */
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/* stupid warnings */
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#address-cells = <1>;
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#size-cells = <1>;
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__overlay__ {
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status = "okay";
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#address-cells = <2>;
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#size-cells = <1>;
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pinctrl-names = "default";
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pinctrl-0 = <&bb_gpmc_pins>;
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/* chip select ranges */
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ranges = <0 0 0x10000000 0x02000000>; /* CS0 @addr 0x01000000, size 0x02000000 */
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sram@0 {
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compatible = "raptorengineering,ulab","sram";
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address-cells = <1>;
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size-cells = <1>;
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bank-width = <1>;
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};
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};
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};
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};
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@ -0,0 +1,47 @@
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# Copyright (C) 2014 Timothy Pearson
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#
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# Permission to use, copy, modify, and/or distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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AR = ar
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RANLIB = ranlib
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CC = gcc
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CFLAGS += -Wall -Os -ggdb -MD
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#CFLAGS += -Wextra -Wno-unused-parameter -Werror
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help:
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@echo ""
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@echo "Usage:"
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@echo ""
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@echo " $(MAKE) bbb-gpmc-test"
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@echo " .... build bbb-gpmc-test"
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@echo ""
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@echo " $(MAKE) all"
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@echo " .... build everything"
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@echo ""
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@echo " $(MAKE) install"
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@echo " .... install everything in /usr/"
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@echo ""
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all: bbb-gpmc-test
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install: all
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install -Dt /usr/bin/ bbb-gpmc-test
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bbb-gpmc-test: bbb-gpmc-test.o
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clean:
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rm -f bbb-gpmc-test.o
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-include *.d
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@ -0,0 +1,3 @@
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Disable eMMC in uEnv.txt
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Comment out eMMC block in /boot/dtbs/am335x-boneblack.dts (mmc@481d8000)
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Compile and install uLab cape (BB-ULAB-00A0.dts) in /lib/firmware, then load it via the cape manager
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@ -0,0 +1,240 @@
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/*
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* bbb-gpmc-test
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*
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* Copyright (C) 2014 Timothy Pearson <kb9vqf@pearsoncomputing.net> (Beaglebone Black)
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#include <sys/time.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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/** BEGIN: Low-Level I/O Implementation **/
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// Beaglebone Black GPMC driver
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <fcntl.h>
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#define MEMORY_SPACE_ADDRESS_BITS 15
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#define GPMC_BASE 0x50000000
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#define GPMC_REGLEN 0x10000000
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#define GPMC_CHIPSELECTCONFIGDISPLACEMENT (0x30 / 4)
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#define GPMC_CONFIG (0x50 / 4)
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#define GPMC_CONFIG1 (0x60 / 4)
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#define GPMC_CONFIG2 (0x64 / 4)
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#define GPMC_CONFIG3 (0x68 / 4)
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#define GPMC_CONFIG4 (0x6c / 4)
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#define GPMC_CONFIG5 (0x70 / 4)
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#define GPMC_CONFIG6 (0x74 / 4)
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#define GPMC_CONFIG7 (0x78 / 4)
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#define MEMORY_SIZE (1 << MEMORY_SPACE_ADDRESS_BITS)
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int mem_fd = 0;
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int gpmc_mem_fd = 0;
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char *gpio_mem, *gpio_map, *gpmc_map;
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// I/O access
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static volatile unsigned int *gpio = NULL;
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static volatile unsigned char *gpio_char = NULL;
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static volatile unsigned int *gpmc = NULL;
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static void gpmc_mapregisters()
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{
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/* open /dev/mem */
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if ((gpmc_mem_fd = open("/dev/mem", O_RDWR|O_SYNC) ) < 0) {
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printf("can't open /dev/mem \n");
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exit (-1);
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}
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/* mmap GPMC */
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gpmc_map = (char *)mmap(
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0,
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GPMC_REGLEN,
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PROT_READ|PROT_WRITE,
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MAP_SHARED,
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gpmc_mem_fd,
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GPMC_BASE
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);
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if (gpmc_map == MAP_FAILED) {
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printf("mmap error %d\n", (int)gpmc_map);
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exit (-1);
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}
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// Always use volatile pointer!
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gpmc = (volatile unsigned *)gpmc_map;
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}
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static void gpmc_unmapregisters()
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{
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munmap((void*) gpmc, GPMC_REGLEN);
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if (gpmc_mem_fd != -1) {
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close(gpmc_mem_fd);
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}
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}
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static void gpmc_setup(void)
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{
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// WARNING: The GPMC runs at the L3 clock frequency!
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// It is not well documented, but that frequency seems to be 200MHz on the AM335x series of chips
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gpmc_mapregisters();
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if (gpmc != NULL) {
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int chipselect = 0;
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int displacement = GPMC_CHIPSELECTCONFIGDISPLACEMENT * chipselect;
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// disable before playing with the registers
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*(gpmc + displacement + GPMC_CONFIG7) = 0x00000000;
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*(gpmc + displacement + GPMC_CONFIG) = 0x00000000; // Unlimited address space
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*(gpmc + displacement + GPMC_CONFIG1) = 0x00000000; // No burst, async, 8-bit, non multiplexed
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// // 200MHz compatible SRAM device
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// *(gpmc + displacement + GPMC_CONFIG2) = 0x00000800; // Assert CS on fclk 0, deassert CS on fclk 8
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// *(gpmc + displacement + GPMC_CONFIG3) = 0x00000200; // Assert ADV on fclk0, deassert ADV on fclk2
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// *(gpmc + displacement + GPMC_CONFIG4) = 0x06020802; // Assert WE on fclk2, deassert WE on fclk6, assert OE on fclk2, deassert OE on fclk8
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// *(gpmc + displacement + GPMC_CONFIG5) = 0x00060808; // Data valid on fclk 6, cycle time 8 fclks
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// 100MHz compatible SRAM device
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*(gpmc + displacement + GPMC_CONFIG2) = 0x00001000; // Assert CS on fclk0, deassert CS on fclk16
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*(gpmc + displacement + GPMC_CONFIG3) = 0x00000400; // Assert ADV on fclk 0, deassert ADV on fclk 4
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*(gpmc + displacement + GPMC_CONFIG4) = 0x0c041004; // Assert WE on fclk4, deassert WE on fclk12, assert OE on fclk4, deassert OE on fclk16
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*(gpmc + displacement + GPMC_CONFIG5) = 0x000c1010; // Data valid on fclk 12, cycle time 16 fclks
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*(gpmc + displacement + GPMC_CONFIG6) = 0x00000000; // No back to back cycle restrictions
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*(gpmc + displacement + GPMC_CONFIG7) = 0x00000e50; // CS0: Set base address 0x10000000, 32MB region, and enable CS
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gpmc_unmapregisters();
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}
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}
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static void io_setup(void)
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{
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printf("sizeof int:\t%d\n", sizeof(int));
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/* open /dev/mem */
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if ((mem_fd = open("/dev/mem", O_RDWR|O_SYNC) ) < 0) {
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printf("can't open /dev/mem \n");
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exit (-1);
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}
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/* mmap GPIO */
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gpio_map = (char *)mmap(
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0,
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MEMORY_SIZE,
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PROT_READ|PROT_WRITE,
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MAP_SHARED,
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mem_fd,
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0x10000000
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);
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if (gpio_map == MAP_FAILED) {
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printf("mmap error %d\n", (int)gpio_map);
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exit (-1);
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}
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// Always use volatile pointer!
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gpio = (volatile unsigned *)gpio_map;
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gpio_char = (volatile unsigned char *)gpio_map;
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// Select a test from the following blocks of code...
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// // DEBUG ONLY
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// // Clear out the mapped memory
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// int i;
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// for (i=0;i<0x3ff; i++) {
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// *(gpio + i) = 0x00000000;
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// }
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// DEBUG ONLY
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// Fill the mapped memory with a test pattern
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// int j;
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// for (j=0;j<0x00001000; j++) {
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// *(gpio + j) = j;
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// }
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// int j;
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// for (j=0;j<0x3ff; j++) {
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// *(gpio + j) = j;
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// }
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int j;
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for (j=0;j<MEMORY_SIZE; j++) {
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*(gpio_char + j) = ((unsigned char)j);
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}
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// DEBUG ONLY
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// Prints the contents of the mapped memory
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int k;
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for (k=0;k<(MEMORY_SIZE/4); k++) {
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printf("0x%08x\t%08x\n", k, *(gpio + k));
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}
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fflush(stdout);
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// // DEBUG ONLY
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// // Excercise the memory space
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// int l;
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// while (1) {
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// for (l=0;l<(MEMORY_SIZE/4); l++) {
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// k = *(gpio + l);
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// }
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// }
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// while (1) {
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// printf("0x%08x\t0x%08x\t0x%08x\t0x%08x\r", *(gpio + 0), *(gpio + 1), *(gpio + 2), *(gpio + 3));
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// usleep(1);
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// }
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// while (1) {
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// printf("0x%08x\t0x%08x\t0x%08x\t0x%08x\r", *(gpio + 3), *(gpio + 2), *(gpio + 1), *(gpio + 0));
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// usleep(1);
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// }
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|
||||
// printf("0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\n\r", *(gpio_char + 0), *(gpio_char + 0), *(gpio_char + 0), *(gpio_char + 0), *(gpio_char + 0), *(gpio_char + 0), *(gpio_char + 0), *(gpio_char + 0));
|
||||
//
|
||||
while (1) {
|
||||
// printf("0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\r", *(gpio_char + 0), *(gpio_char + 1), *(gpio_char + 2), *(gpio_char + 3), *(gpio_char + 4), *(gpio_char + 5), *(gpio_char + 6), *(gpio_char + 7));
|
||||
// printf("0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\r", *(gpio_char + 0), *(gpio_char + 1), *(gpio_char + 2), *(gpio_char + 3), *(gpio_char + 0x1000), *(gpio_char + 0x1001), *(gpio_char + 0x1002), *(gpio_char + 0x1003));
|
||||
printf("0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\r", *(gpio_char + 0), *(gpio_char + 1), *(gpio_char + 2), *(gpio_char + 3), *(gpio_char + 0x4000), *(gpio_char + 0x4001), *(gpio_char + 0x4002), *(gpio_char + 0x4003));
|
||||
// printf("0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\t0x%02x\r", *(gpio_char + 0x4000), *(gpio_char + 0x4001), *(gpio_char + 0x4002), *(gpio_char + 0x4003), *(gpio_char + 0x4000), *(gpio_char + 0x4001), *(gpio_char + 0x4002), *(gpio_char + 0x4003));
|
||||
usleep(10);
|
||||
}
|
||||
}
|
||||
|
||||
static void io_shutdown(void)
|
||||
{
|
||||
//
|
||||
}
|
||||
|
||||
/** END: Low-Level I/O Implementation **/
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
gpmc_setup();
|
||||
printf("GPMC setup complete!\n"); fflush(stdout);
|
||||
io_setup();
|
||||
return 0;
|
||||
}
|
||||
|
||||
Loading…
Reference in new issue